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/***
*malloc.c - Win32 malloc/free heap routines
*
* Copyright (c) 1991-1992, Microsoft Corporation. All rights reserved.
*
*Purpose:
*
*Revision History:
* 01-10-92 JCR Module created.
* 02-04-92 GJF Replaced windows.h with oscalls.h.
* 05-06-92 DJM POSIX support.
* 06-15-92 KRS Enable C++ support.
* 09-09-92 SRW _POSIX_ not even close.
* 09-23-92 SRW Change winheap code to call NT directly always
* 10-28-92 SRW Change winheap code to call Heap????Ex calls
* 11-05-92 SKS Change name of variable "CrtHeap" to "_crtheap"
* 11-07-92 SRW _NTIDW340 replaced by linkopts\betacmp.c
* 11-16-92 SRW Heap???Ex functions renamed to Heap???
*
*******************************************************************************/
#include <cruntime.h>
#include <malloc.h>
#include <winheap.h>
#include <os2dll.h>
#include <oscalls.h>
#ifndef _POSIX_
#include <new.h>
_PNH _pnhHeap = NULL;
#endif
/***
*void *malloc(size_t size) - Get a block of memory from the heap
*
*Purpose:
* Allocate of block of memory of at least size bytes from the heap and
* return a pointer to it.
*
*Entry:
* size_t size - size of block requested
*
*Exit:
* Success: Pointer to memory block
* Failure: NULL (or some error value)
*
*Uses:
*
*Exceptions:
*
*******************************************************************************/
void * _CALLTYPE1 malloc(n)
size_t n;
{
HANDLE h;
n = (n ? n : 1); /* if n == 0, n = 1 */
#ifndef _POSIX_
for (;;) {
#endif /* ndef _POSIX_ */
h = HeapAlloc(_crtheap,
0,
n
);
#ifndef _POSIX_
if ((h != 0) || (_pnhHeap == NULL) || (*_pnhHeap)(n) == 0)
#endif /* ndef _POSIX_ */
return((void *)h);
#ifndef _POSIX_
}
#endif /* ndef _POSIX_ */
}
/***
*void free(pblock) - free a block in the heap
*
*Purpose:
* Free a memory block in the heap.
*
* Special ANSI Requirements:
*
* (1) free(NULL) is benign.
*
*Entry:
* void *pblock - pointer to a memory block in the heap
*
*Return:
* <void>
*
*******************************************************************************/
void _CALLTYPE1 free(pblock)
void * pblock;
{
HeapFree(_crtheap,
0,
pblock
);
}
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